Some dogs have a favourite toy, but Bertus the greater one-horned rhino has a favourite tyre.

Bertus loves his tyre so much, in fact, that he sleeps with his head inside it and carries it around with him in his enclosure so he can lie down with it if he feels a bit "tyred" (sorry).

"I'm a lion" (Image: twitter.com/edinburghzoo)

The Edinburgh Zoo favourite moved to a new home at Batu Secret Zoo in Indonesia in June 2018 as part of a breeding programme intended to help secure the future of his species. But Scottish zoo officials made sure that his beloved tyre was included in his luggage; it traveled with him for the entire 48-hour journey.

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And for the first few days after he moved to Indonesia, Bertus was kept in his indoor enclosure along with his trusty tyre, to help him feel at home .

The greater one-horned rhino (also known as an Indian rhinocerous) is native to the Indian subcontinent, and is listed as "vulnerable", with only around 3,555 remaining in the wild. Indian rhinos are the biggest one-horned species in the world: they can reach a height of around 2 meters and weigh around 2,800 to 3,000 kilograms.

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Bertus the tyre-loving rhino is in Indonesia to take part in the European Endangered species Programme (EEP), and it's hoped that he'll breed with a female Indian rhino that Batu Secret Zoo plans to introduce him to shortly.

Let's hope she shares his deep love of tyres, otherwise the relationship with no doubt fall a bit flat.